The images went around the world. The snapshots of the Great Barrier Reef, from Cairns to Torres Strait, looked more like a pile of bones than coral. Professor Terry Hughes, director of the Australian Research Council’s Centre of Excellence for Coral Reef Studies at James Cook University in Townsville, was surveying the reef by plane and helicopter. It was, he wrote on 26 March, “the saddest trip of my life”.
From 22 March, Hughes criss-crossed 520 individual reefs in four days, covering 3200 kilometres by air. Just four showed no evidence of bleaching. The further north Hughes travelled, over what were once the most pristine waters of the reef, unspoiled by the runoff that pollutes the south, the worse the bleaching became. Fringing reefs in Torres Strait, he said, were “completely white”.
The Australian Institute of Marine Science currently has 300 researchers swarming over the reef, complementing the aerial surveys. Reefs are scored on a scale of zero, which indicates no bleaching, to four, which means more than 60 per cent is bleached. Their observations have replicated Hughes’. In the meantime, Hughes has continued southwards, trying to find a limit to the unfolding tragedy beneath him.
Like most scientists, Hughes prefers to talk in numbers.… Read more..